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      https://www.ias.ac.in/article/fulltext/pram/033/06/0667-0672

    • Keywords

       

      Tetracyanoethylene; high pressure; electrical resistivity; X-ray diffraction; phase transformation kinetics

    • Abstract

       

      This paper reports the phase transformation behaviour of tetracyanoethylene (TCNE) under pressure as revealed by AC electrical resistivity, its time evolution and X-ray diffraction studies. An irreversible transformation from monoclinic to cubic phase occurs at 2.1±0.1 GPa and is indicated by a sharp resistivity drop at this pressure. The time evolution of resistivity studies indicate that this transformation occurs via an intermediate phase having resistivity higher than either of the two crystalline phases. Finally, the kinetics of phase transformations obtained by time evolution of resistivity is compared with the X-ray studies on the pressure quenched TCNE.

    • Author Affiliations

       

      P Ch Sahu1 K Govinda Rajan1 Mohammad Yousuf1 R Mukhopadhyay1 2 S L Chaplot1 2 K R Rao1 2

      1. Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, India
      2. Bhabha Atomic Research Centre, Trombay, Bombay - 400 085, India
    • Dates

       
  • Pramana – Journal of Physics | News

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